D miningwell second hand screw air compressor for truck mounted rig
Screw air compressors have been widely used in modern industries for their reliability and energy saving. Correct maintenance and maintenance of screw air compressors plays a crucial role in the service life and operational reliability of screw air compressors. Next, Deman Energy tells you how to properly maintain and maintain the screw air compressor.
1. Maintenance and maintenance of the intake air filter.
The air filter is a component that filters out dust and dirt in the air, and the filtered clean air enters the compression chamber of the screw rotor for compression. Because the internal clearance of the screw machine only allows particles within 15u to be filtered out. If the air filter element is blocked and damaged, a large number of particles larger than 15u will enter the screw machine for circulation, which will not only greatly shorten the service life of the oil filter element and oil fine separation core, but also cause a large number of particles to directly enter the bearing cavity, which will accelerate the bearing wear and increase the rotor gap. The compression efficiency is reduced, and even the rotor is dry and seized.
The air filter is serviced once a week. Unscrew the gland nut, take out the air filter element, use 0.2-0.4Mpa compressed air to blow out the dust particles on the outer surface of the air filter element from the inner cavity of the air filter element, and wipe the dirt on the inner wall of the air filter housing with a clean rag clean. Reinstall the air filter element so that the sealing ring at the front end of the air filter element should be tightly fitted with the inner end surface of the air filter housing.
Under normal circumstances, the air filter element should be replaced every 1000-1500 hours, and the air filter element should be replaced every 500 hours in particularly harsh environments.
Note: When cleaning or replacing the air filter element, check the parts one by one to prevent foreign objects from falling into the intake valve. Usually, it is necessary to check whether the intake telescopic pipe is damaged or flattened, and whether the connection between the telescopic pipe and the air filter intake valve is loose or leaking. If found, it must be repaired and replaced in time.
2. Replacement of oil filter.
After the new machine runs for 500 hours for the first time, the oil core should be replaced. Use a special wrench to reverse the oil filter element to remove it. Before installing the new filter element, add screw oil. Screw the filter element seal back to the oil filter seat with both hands and tighten it firmly.
It is recommended to replace the new filter element every 1500-2000 hours, and replace the oil filter element at the same time when changing the oil. The replacement cycle should be shortened when the environment is harsh. It is strictly forbidden to use the oil filter beyond the time limit.
3. Maintenance and replacement of fine oil separator.
The oil fine separator is a component that separates the screw lubricating oil from the compressed air. Under normal operation, the service life of the oil fine separator is about 3,000 hours, but in harsh environments, the maintenance and replacement cycle of the air filter must be shortened, and even consider adding Install the front air filter.
The fine oil separator must be replaced when it expires or the pressure difference between the front and rear exceeds 0.12Mpa.
Replacement method: Remove each control pipe joint installed on the oil and gas tank cover. Take out the oil return pipe extending into the oil and gas barrel on the cover of the oil and gas barrel, and remove the fastening bolts of the upper cover of the oil and gas barrel. Remove the top cover of the oil and gas tank and take out the fine oil separator. Remove asbestos pads and dirt stuck to the upper cover. Install a new fine oil separator, pay attention that the upper and lower asbestos pads must be stapled, and the asbestos pads must be neatly arranged when pressing, otherwise it will cause flushing. Reinstall the top cover, oil return pipe, and control pipes as they are, and check for leaks.
4. Maintenance and replacement of screw oil.
The quality of the screw oil has a decisive influence on the performance of the oil-injected screw machine. Good oil has good anti-oxidative stability, rapid separation, good foaming, high viscosity and good anti-corrosion performance. Therefore, pure special oil must be used. Screw oil. The oil should be replaced for the first time after the running-in period of the new machine for 500 hours, and the new oil should be replaced every 2000 hours of operation thereafter. Change the oil filter at the same time as the oil change.
Replacement method: Start the compressor to run for 5 minutes, so that the oil temperature rises above 50 ℃, and the oil viscosity decreases. Stop running, when there is 0.1Mpa pressure in the oil and gas barrel, open the oil drain valve at the bottom of the oil and gas barrel, and connect the oil storage tank. Slowly open the oil drain valve, and close the oil drain valve after the lubricating oil is dripping. Unscrew the oil filter element, drain the lubricating oil in each pipeline at the same time, and replace with a new oil filter element. Open the filler plug, inject new oil, make the oil level within the range of the oil mark scale, tighten the filler plug, and check for leakage. During the use of lubricating oil, if the oil level line is found to be too low, new oil should be replenished in time, and condensed water must be discharged frequently, once a week, and once every 2-3 days in high temperature climates. It is strictly forbidden to mix and use different brands of lubricating oil, and do not use the lubricating oil over time.
5. Maintenance of the cooler.
The cooling effect of the cooler directly affects the operating temperature of the air compressor. The screw cooler is upright. During maintenance, it is necessary to blow dry compressed air above 0.4Mpa from the outside to the inside. After blowing it, clean the dust and particles in the air guide hood to prevent it from being blown in by the fan for cooling again. cause blockage in the machine, causing the machine to heat up.
In short, it is very necessary to replace parts and lubricating oil regularly according to the operating procedures, clean the oil circuit system and the water circuit of the cooler, comprehensively record the operating parameters, analyze them regularly, find out the problems, and repair them in time.
